Avoid LB7 Duramax Injector Leaks - Engine Builder Magazine
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Avoid LB7 Duramax Injector Leaks

LB7 Duramax engines are very prone to leaking on the injector return line underneath the valve cover, causing the crankcase to fill with diesel fuel, which leads to all kinds of issues. LinCo Diesel Performance developed a method to test for this, which saves the shop from countless comebacks. Check it out.

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